Illusion Audio C6W Carbon C6 Midbass Driver (each) - Single

Woven carbon fiber cone with rubber surround, cast aluminum basket
Free Air Resonance: 67.29 Hz
Nominal Impedance: 4 Ohms
Sensitivity 2.83 V @ 1 meter: 90.7
Outside Diameter: 166.5 mm
Mounting Hole Diameter: 137.4 mm
Mount Depth: 53.3 mm
Maximum Linear Excursion: ± 7.7 mm